Broom-winding machine



Sept. 3, 1929. RAUHOFF I 1,727,042

BROOM WINDING MACHINE Filed 1926 4 Sheets-Sheet 1 p 2 J. M. RAUHOFF 1,727,042

BROOM WINDING MACHINE Filed Jan. 8, 1926 4 Sheets-Sheet 2 l:llIll" lIllIIllllllllllllllllllllllllIIIIILh El Sept. 3, 1929.

J, M. RAUHOFF BROOM WINDING MACHINE F le J n. 1926 4 Sheets-Sheet 5 mm mm an mm MN jive/0 w,

Q. N @v N mm. a. @QW 6 ON QM, NWJQ mm m% mm NW N 4 b O QM M @W m Sept. 3, 1929. J. M. RAUHOFF V BROOM WINDING MACHINE 4 Sheet-Sheet 4 Jan 8' v NQNQ .QQ mm I lil 1 Patented Sept. 3, 1929.

UNHTED STATES JOHN M. RAUHOFF, OF TINLEY PARK, ILLINOIS.

BROOM-WINDING M'ACI-IINE.

Application filed January 8, 1926.

My invention relates to machines for the winding of the wire about the bristles applied to the end of the handle of the broom in the forming of the brush-head thereof,

as for example, and more particularly, in the manufacture of floor brooms made of broom corn.

While my invention is not limited for use in manufacturing brooms having handles of a given length, I have devised it for use more particularly in manufacturing brooms of a character comprising a sectional handle portion, with the bristle head of the broom provided on the end of the short section, with the other end of this section containing a threaded socket to receive the threaded rod portion of a coupling device carried by the other handle section, such atype of broom being shown in U: S. Letters Patent No. 1,467,115 granted to me September 4, 1923. I have therefore chosen to illustrate my invention as incorporated in a machine adapted for the manufacture of brooms of the type shown in this patent, but without, however, intending to limit it thereto.

Referring to the accompanying draw- 1ngs:

Figure 1 is a front view of a machine embodying my improvements. Figure 2 is a plan sectional view taken at the line 22 on Fig. 1 and viewed in the direction of the arrows. Figure 3 is a plan sectional view taken at the line 33 and viewed in the direction of the arrows. Figure 4 is an enlarged view in longitudinal sectional elevation, the section being taken at the line 4% on Fig. 2 and viewed in the direction of the arrows, this view showing the details of the handle clamping and rotating means forming a part of the machine with a handle secured therein. Figure 5 is a similar view of the clamping portion of the mechanism shown in Fig. a, with certain parts thereof shown in elevation. Figure 6 is a view in elevation, with one of the parts sectioned, of the clamping device of Fig. 5. Figure 7 is a view in end elevation of a portion of the machine, this view showing the means for controlling the position of the handle clamping device. Figure 8 is an enlarged View, partly sectional, taken at the line 8 on Fig. 2 and view-ed in the direction of the arrow. Figure 9 is a plan View of the structure shown in Fig. 8. Figure 10 is a section taken at the line 1010 on Fig. 9 and viewed in the direction of the arrows. Figure 11 is a section taken Serial No. 79,969.

at the line 11 on Fig. 8 and viewed in the direction of the arrow; and Figure 12, an enlarged sectional View taken at the line 12 on Fig. 2 and viewed in the direction of the arrow.

The machine shown comprises a frame represented generally at 20 and on which is journalled mechanism, represented generally at 21, for rotating, under the control of the operator, the wood handle represented at 22 and on which the head of the broom is to be formed, it being understood that, in accordance with common practice, the operator in producing the head builds it up of broom corn or the like, applied to the outer end of the handle 22, securing the bristles in place by wire wound about them, tht bristle material to be used in making the head, being conveniently support-ed, for ready access by the workmen, on shelves 23 and 24.

The wire for securing the bristles in place on the handle 22, is represented at 25, it being shown as provided in the form of a hollow spool 26 supported on a revoluble disk 27 journalled to rotate around a stud 28 secured to the frame 20, the disk 27 being connected with an upper, smaller, disk 29 through the medium of rods 30, the frame 20 carrying a journalling pin 31 slida-ble into and out of journalling engagement with the disk 29. The wire 25 leads ofi from the spool 26 thereof and rotatably supported as will be understood from the foregoing description, to and through an eye 32 secured to the frame of the machine and thence around a pulley 33 carried by, and rotatable with, a shaft 34, the construction just described forming a part of a tauting device controlled by a lever 85, of a construction well known in the art, and as my invention does not relate to such feature of the machine, detailed description thereof appears to be unnecessary.

The wire 25 continues upwardly from the taut-ing device 23 over and into engagement with a threaded rotatable lead screw 36 journalled in brackets 37 on the frame of the machine, the wire leading downwardly from the device 36 into a position in which it may wind upon the handle portion 22, the lead device 36 being provided for the purpose, as is well understood in the art, of causing the wire to be spirally wound on the handle portion uniformly throughout the length of the wound portion.

Referring now to the mechanism by which the handle portion 22 is rotated, under the control of the operator, it comprises a hollow shaft 38 journalled in spaced apart bearings 39 carried by the frame 20, this shaft being provided with opposed friction disks 40 and 41 rigidly secured thereon by the set screws 42 and 43, respectively, the friction disks being provided for alternate engagement, under the control of the operator, .with a drive roller 44 cooperating with driving and shifting means hereinafter described, whereby the shaft 38 may be rotated in either direction depending upon which one of the disks 40 and 41, is contacted by the drive roller 44.

The hollow shaft 38 contains a shaft 45 which is slidable lengthwise therein and is driven by the shaft 38 through the medium of a pin 46 extending transversely of this hollow shaft and through an elongated slot 47 in the shaft 45. The forward end of the shaft 45 is threaded, as represented at 48,

' the resilient ends of the camming device 49 inwardly, when the sh aft 45 is shifted to the right to the position shown in Fig. 4, the outer end of the shaft 38 being shown as provided with an encircling reenforcing sleeve 53 for resisting radial pressure exerted against the outer end portion of the shaft 38 in the operation of clamping a handle in place.

It may be here stated that the handle portion 22 shown in the drawings is, preliminary to its assembly in the machine, formed at its tapered end shown in Fig. 4, with a threaded socket 54 to receive the threaded rod of the handle coupling device hereinbefore referred to and shown in said Letters Patent. This socket portion is availed of as a means, cooperating with a similarly threaded rod. for ensuring the rigid holding of the handle 22 to the drive mechanism described, to cause the handle to rotate practically true and not be displaced by hammering or pounding the handle which is commonly done in the forming of the brush-head thereon. Such a threaded screw is represented at 55, it being rigidly secured at one end in a socket 56 in the outer end of the shaft 45, to extend at its threaded end concentric with the clamping device 49.

The drive roller 44 is shown as carried on the end of a shaft 44 journalled in a bearing 57 provided with laterally extending bearing portions 58 of angle shape in cross section, the angle portions of which are represented at 59 and 60, respectively. The bearing portions through, and through the bearing bar 61 and screwing into a bracket 67 located at the underside of this bar. The bearing member 57 thus adapted to be shifted along the bar 61, to cause the drive roller 44 to engage with the friction disk 40 or 41, as desired, is yield- I ingly held in a position in which the drive roller 44 is in engagement with neither of the disks 40 and 41, by means of coil springs 68 and 69 confined between the ends of the hearing member 57 and the bracket 62 one of these springs instead of directly engaging the bracket, bearing against a nut 70 threaded on the bar 61.

The bearing member 57 is shifted for driving the shaft 38 in either direction by the disks 40 and 41, through the medium of separately operable treadle mechanisms one of which comprises the treadle 71 fixed on a shaft 72 journalled in the frame 20 and pivotally connected, through an arm 73, with a link 7 4 which is pivotally connected at 75 with one end of a rocking head 76 pivoted at 77 on the bracket 67 and provided intermediate its ends with a boss 78 which extends upwardly into a recess 79 in the flanged portion 60 of the bearing 57. The other treadle mechanism referred to comprises a treadle 80 fixed on a shaft 81 journalled on the frame 20 and provided with a .crank arm 82 with which the lower end of a link 83 is pivotally connected, as indicated at 84, the upper end of this link being pivotally connected, as indicated at 85, with the other end of the rocking head 76.

It will be understood from the foregoing that these treadle mechanisms control the movement of the roller 44 into engagement with. the friction disks 40 and 41, respectively, the spring mechanism referred to operating to move the roller 44 to neutral, disengaged, position, when pressure is exerted against neither of the treadles.

The machine also comprises means whereby the handle 22 to be operated on, may be quickly and easily clamped to, and unclamped from, the drive mechanism described, these means comprising a circular nut 86, the threads of which engage with threads 87 on the inner end of the shaft 45 the adjacent end of the hollow shaft 38 containing an annular groove 88 into which the inner edge of a ring 89 rigidly secured to the nut 86 extends, the construction just described constituting thrust-resisting means for the nut whereby the nut and shafts 38 and are-adapted for relative rotation and the nut is held against movement lengthwise of the shaft 38, it being understood that the shafts 38 and 45 and nut 86, in the normal condition of the machine rotate as a unitary structure, but should pressure he applied to the nut 86 restraining its rotation, the threaded engagement thereof with the shaft 45 will cause the latter to shift lengthwise in the shaft 38 to the right or to the left in Fig. 4 depending upon the direction in which the shaft 38 is being driven, and thus the outer split end of the clamping device 49 will be contracted, to clamp the handle in place, or permit it to expand to release the handle.

The mechanism shown for controlling the restraining of the nut 86 comprises a split band 90 partially encircling the nut 86 with one of its ends rigidly secured to the frame of the machine as indicated at 91. Its other, free, end is shown as provided with a shoulder 92 adapted to be engaged by the end portion 93 of a lever 94 fulcrumed at 95 on the frame of the machine, the outer end 96 of this lever overlying one end 97 of a lever 98 fulcrumed at 99 on the frame 20. Thus when the operator forces the lever 98 downwardly. it rocks the lever 94 against the free end of the brake 98, contracting the latter about the nut and holding it against rotation.

A general description of the operation of the machine is as follows. Assuming the shaft 45 to be shifted to the left in Fig. 4 inside of the shaft 38, in which position the clamping device 49 is in expanded condition, the operator by actuating the treadle 71 connects the drive roller 44 with the friction disk 40, whereupon the shafts 38 and 45 rotate together in clockwise direction in Fig. 7. The operator then introduces the tapered portion of the handle 22 into the clamping device 49 the threaded rod entering the threaded socket 54 in the handle and engaging the threads thereof, the handle moving inwardly into the clamping device 49. As the handle 22 nears the limit of its inward movement, the operator presses down on the lever 98 to hold the nut 86 against rotation, whereupon the continued rotation of the shafts 38 and 45, causes the shaft 45 to move to the right in Fig. 4 to the position therein shown, the outer contractible end of the clamping device 49 being forced in this movement, by sliding against the tapered surface 52, into tight gripping engagement with the inner end of the handle, whereupon the operator releases the pressure against the lever 98, freeing the nut of restraining pressure. The handle 22 being thus rigidly clamped to the driving mechanism, the operator forms the brush head on the outer end of the handle, in accordance with common practice, using the wire 25 to bind the bristles in place. At the on the treadle which conditions the drive mechanism for rotating the shafts 38 and 45 in the reverse direction, and by the operator holding the handle 22 and pressing down on the lever 98, the latter operation to stop rotation of the nut 86 which causes the shaft 45 to move to the left in Fig. 4 and release the clamp 49, the handle 22 is released for ready removal from the machine.

It will thus be understood from the foregoing description that a machine embodying my invention is not only of simple and economical construction and very easy to operate, but the work of forming the bristle heads of the handles, including the clamping of the latter in place in the machine and the release of the same therefrom, may be very expeditiously performed.

While I have illustrated and described a particular construction embodying my invention, I do not wish to be understood as intending to limit it thereto, as the same may be variously modified and altered without departing from the spirit of the invention, and in this connection it may be stated that while I have shown my machine as designed, more particularly, for the forming of bristle heads on handle sections of relatively short length, the invention is applicable as well to full length handles, such as are commonly provided on brooms.

W'Vhat I claim as new, and desire to secure by Letters Patent, is:

1. In a broom-winding machine, the combination of a drive member, a rotatable handle-clamping device rotated by said drive member, means movable lengthwise of said drive member and controlling the position of said clan'iping device, means operating when said first-named means are moved lengthwise of said drive member in one direction to cause said clamping device to grip the handle, and means whereby the force exerted by said drive member may, under the control of the operator, shift said first-named means lengthwise of said. drive member in a direction to tighten said clamping device upon the work.

2. In a broom-winding machine, the combination of a drive member, a rotatable handle-clamping device rotated by said drive member, means movable lengthwise of said drive member and controlling the position of said clamping device, means operating when said first-named means are moved lengthwise of said drive member in one direction to cause said clamping device to grip the handle, and means whereby the force exerted by said drive member may. under the control of the operator, shift said first-named. means lengthwise of said drive member in a direction to tighten said clamping device upon the workand comprising screw-threaded inter-engaging portions operating when one of said portions is restrained from rotation, to shift said firstnamed means.

3. In a broom-winding machine, the combination of a drive member, a rotatable handle-clamping device rotated by said drive member, means movable lengthwise of said drive member and controlling the position of said clamping device, means operating when said first-named means are moved lengthwise of said drive member in one direction to cause said clamping device to grip the handle, and means whereby the force exerted by said drive member may, under the control of the operator, shift said first-named means lengthwise of said drive member in a direction to release said clamping device from said handle.

4- In a broom-winding machine, the combination of a drive member, a rotatable handle-clamping device rotated by said drive member, means movable lengthwise of said drive member and controlling the position or said clamping device, means operating when said first-named means are moved lengthwise of said drive member in one direction to cause said clamping device to grip the handle, and means whereby the force exerted by said drive iember may, under the control of the operator, shift said first-named means lengthwise of said drive member in a direction to release said clamping device from said handle and comprising screw-threaded interengaging portions operating when one of said portions is restrained from rotating, to shift said firstnamed means.

5. In a broom-winding machine, the combination of a drive member, means for driving said member in. each direction at will, a rotatable handle clamping device rotated by said drive member, means movable lengthwise of said drive member and controlling the position of said clamping device, means operating when said first-named means are moved lengthwise of said drive member in one direction to cause said clamping device to grip the work, and means whereby the force exerted by said drive member may, under the control of the operator, shift said first-named means lengthwise or said drive member selectively in either direction to tighten or loosen said clamping device upon said work. i G. In a broom-winding machine, the combination of a drive member, means for driving said. member in each direction at will, a rotatable handle clamping device rotated by said drive member, means movable lengthwise off said drive member and cont-rolling the posi tion of said clamping device, means operating when said first-named means are moved lengthwise of said drive member in one direction to cause said clamping device to grip the work, and means whereby the force exerted by saiddrive member may, under the control of the operator, shift said first-named means lengthwise of said drive member selectively in either direction to tighten or loosen said clamping device upon said work, and comprising screw-threaded interengaging portions operating when one of said portions is restrained from rotating, to shift said firstnamed means.

7 In a broom-winding machine, the combination of a drive member,a rotatable handle clamping device rotated by said drive member and having a threaded portion and movable lengthwise of said drive member, means operating when said clamping device is moved lengthwise of said drive member in one direction to cause said clamping device to grip the work, a threaded. member engaging the threads of said handle clamping device and adapted to be held against rotation when desired during the rotation of said clamping device, and means for preventing movement of said threaded member lengthwise of said drive member whereby when said threaded member is held against rotation, said handle clamping device is moved lengthwise.

8, in a broom-winding machine, the combination of a hollow drive member, a rotatable handle clamping device located inside of said drive member and movable lengthwise thereof, said device having a threaded portion, means "for driving said device from said drive member, while permitting relative lengthwise movement of these parts, means operating when said clamping device is moved lengthwise of said drive member in one direction to cause said clamping device to grip the work, a threaded member engaging the threads of said clamping device and adapted to be held against rotation when desired during the rotation of said handle clamping device, and means for preventing noven'ient of said threaded member lengthwise of said drive member, whereby when said threaded member is held against rotation said clamping device is moved lengthwise.

9. In a broonmvinding machine, the com bination of a drive member, means for driving said member in each direction at will, a rotatable handle clamping device driven by said drive member and having athreaded portion and movable lengthwise of said drive member, means operating when said clamping device is moved lengthwise oil said drive member in one direction to cause said clamping device to grip the work, a threaded member engaging the threads of said clamping device and adapted to be held against rotation when desired during the rotation of said clamping device, and means for preventing movement of said threaded member lengthwise of said drive member in the rotation of the latter in either direction, whereby when said threaded member is held against rotation said clamping device is moved lengthwise in a direction depending upon the direction in which the drive member is rotating.

10. In a broomwinding machine, the combination of a drive member, a member driven by said drive member and movable lengthwise of the latter, said second-named member being threaded, a nut engaging the threads of said second-named member and adapted to be held against rotation when desired during the rotation of said second-named member, handle clamping means operated by said drive member and the position of which is controlled by lengthwise movement of said second-named member, and means operating to hold said nut against movement lengthwise of said drive member in either direction along the latter.

11. In a broom-winding machine, the combination of a drive member, a member driven by said drive member and movable lengthwise of the latter, said second-named member being threaded, a nut engaging the threads of said second-named member, handle clamping means operated by said drive member and the position of which is controlled by lengthwise movement of said second-named member, means for holding said nut against movement lengthwise of said drive member, and means under the control of the operator for holding said nut against rotation.

12. In a broom-winding machine, the combination of a hollow drive shaft, means for driving said shaft in either direction at will, a shaft located within said drive shaft and movable lengthwise of the latter and having a threaded extremity, a work-clamping tubular member secured to an end of said second shaft, with its outer end of split form to permit it to be expanded and contracted, said clamping member in the movement of said second member in one direction contracting to engage the Work, means for driving said second member from said drive member, and a nut engaging the threaded portion of said second member and interlocked with said drive member to prevent lengthwise movement of said nut, but permitting rotation of said drive member relative to said nut.

13. In a broom-winding machine, the combination of a drive member, and a handle clamping device and a threaded rod driven by said drive member, the threaded portion of said rod being located within said device and adapted to enter the end of the handle to be clamped.

14. In a broom-winding machine, the combination of a drive member, a member movable lengthwise of said drive member and having a handle clamping portion and a threaded rod portion, the threaded portion of said rod being located within said clamping portion and adapted to enter the end of the handle to be clamped, means operating when said second member is moved lengthwise in one direction to cause said clamping portion to grip the handle, means for driving said second member by said drive member,

and means for effecting lengthwise movement of said second member.

15. In a broom-winding machine, the combination of a drive member, a member movable lengthwise of said drive member and having a handle clamping portion and a threaded rod portion, the threaded portion of said rod being located within said clamping portion and adapted to enter the end of the handle to be clamped, means operating when said second member is moved lengthwise in one direction to cause said clamping portion to grip the handle, means for driving said second member by said drive member, said second member having a second threaded portion, a threaded member engaging the threads of said second threaded por tion, and means for preventing movement of said threaded member lengthwise of said drive member, whereby when said threaded member is held against rotation said second member is moved lengthwise.

16. In a broom-winding machine, the combination of a drive element, handle-clamping means operated by said drive element, and members having threaded connection with each other and driven by said drive element, one of said members being lengthwise movable and in such movement controlling the position of said clamping means and the other of said members being operative in the relative rotation of said members in either direction during rotation of said drive element, to positively shift the other of said members to open or close said clamping means.

17. In a broom-winding machine, the combination of a drive member, a member driven by said drive member and movable lengthwise of the latter, said second-named member being threaded, a nut engaging the threads of said second-named member, handle clamping means operated by said drive member and the position of which is controlled by lengthwise movement of said second-named member, and thrust-resisting means positioned to be engaged by said nut for holding the latter against movement lengthwise of said drive member in either direction along the latter.

18. In a broom-winding machine, the com bination of a drive member, a member driven by said drive member and movable lengthwise of the latter, said second-named member being threaded, a nut engaging the threads of said second-named member, handle clamping means operated by said drive member and the position of which is controlled by lengthwise movement of said second-named member, means operating to hold said nut against movement lengthwise of said drive member in each direction along the latter and means operative to hold said nut against rotation.

19. In a broom-winding machine, the combination of a drive member, a member driven by said drive member and movable length- Wise of the latter, said second-named member being threaded, a nut engaging the 5 threads of said second-named member, handle clamping means operated by said drive member and the position of Which is controlled by lengthwise movement of said second-named member thrust-resisting means positioned to be engaged by sald nut for holding the latter against movement length-.

JOHN M. RAUHOFR 

